SMS reminders are completely separate from marketing communications.
If you opt-in for SMS reminders you'll receive updates about your orders and our services directly to your mobile as a text message. Opting-in to SMS reminders does not automatically opt you in to receive SMS Marketing.
Your SMS marketing preferences can be managed within your marketing communications preferences. You can view or update this by going to your Account Settings, selecting Marketing Communications and using the SMS marketing tick box to tell us whether or not you would like to receive SMS marketing.